Samsung - SWA-W510/ZA Subwoofer for Soundbar - Black
Digital Designs DD Audio 9912 12" Subwoofer | eBay
Amazon.com: BOSS Audio Systems CXX12 Car Subwoofer - 1000 Watts Maximum Power, 12 Inch , Single 4 Ohm Voice Coil, Sold Individually,Black : Electronics